Performance Comparison of PWM Methods for 27-Level Hybrid Multilevel Inverters

Authors : Mehmet MERAL, Lütfü SARIBULUT, Ahmet TEKE, Mehmet TUMAY

Pages : 689-695

View : 25 | Download : 9

Publication Date : 2012-07-19

Article Type : Research Paper

Abstract :Multilevel inverters have become more popular due to reduced switching losses, low costs, low harmonic distortion and high-voltage capability when compared to traditional PWM inverters. A new family of multilevel inverters that has decreased the number of separated DC sources has emerged named as hybrid multilevel inverter. In this study, theories and applications of four PWM modulation methods for 27 level hybrid multilevel inverters are examined. The comparative case studies are presented to validate the examined modulation technique through harmonic spectrum analysis, output voltage magnitude, THD, WTHD and simulation using Power System Computer Aided Design Program insert ignore into journalissuearticles values(PSCAD);.
Keywords : Hybrid multilevel inverters, H bridge inverters, Reference signal generation, Pulse width modulation PWM,